package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class JDBCDemo11 {
    public static void main(String[] args) {
        try (Connection connection = DBUtil.getConnection();){
            connection.setAutoCommit(false);
            connection.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
            String sql = "UPDATE user SET password=?\n" +
                    "WHERE username=?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,"123456");
            ps.setString(2,"王克晶");
            int num = ps.executeUpdate();
            System.out.println(num > 0 ? "修改成功" : "修改失败");
            connection.commit();
//            connection.rollback();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
























